John t



J. T. DAVIS.

ICE MACHINE.

(No Model.)

No..268,196. Patented Nov. 28, 1882.

INVENTOR WITNE ATTORNEYS.

.more rapid freezing of the water.

UNITED STATES JOHN T. DAVIS,

PATENT @rrrcn.

or NEW YORK, N. Y., ASSIGNOR TO AMY K. KING, or

SAME PLACE.

ICE-MACHINE.

SPECIFICATION forming part of Letters Patent No. 268,196, dated November 28, 1882.

Application filed ApriL12, 1882. (No model.)

To all whom it may concern Be it known that I, JOHN T. DAVIS, of'the city, county, and State of New York, have invented a new and useful Improvement in Ice- Machines, ot'which the followingis afull,clear, and exact description.

The object of my invention is to extract and remove the latent heat from the water introduced into 'the molds, and thereby secure a For that purpose I extract the latent heat by a separate pump and discharge it into a chamber through which a stream of water is allowed In this chamber are also separate coils of pipe used tor the different menstruums employed in the freezing operation, all as set forth more particularly hereinafter.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in both the figures.

Figure 1 is a sectional elevation of my improved ice-machine. Fig. 2 is a plan view of the same, partly sectional.

A is the freezing-chambenin which are the molds a. Between the molds are coils of pipe I), for containing the ammonia, and connected to a pump, B. e

O is a chamber, containing two separate coils of pipe, (I 6, one of which, (I, connects to the ammonia-pump B, while the other coil, 0, connects to a second pump, D. The pump D is connected by a suction-pipe,f, with the freezing-chamber A, for the purpose of drawing off the salt-water or chloride ot'magnesia or other saline solution which is contained in the freezing-vessel.

E is a third pump, having its suction-pipeg connected to the top of the freezing-vessel A, and providedwith a discharge-pipe, ii, that passes through the top of the cham her 0 and terminates near the bottom of the chamber.

i is a pipe connected with the top of chamher 0, for supplying cold water, and in the which accumulates in the top of the vessel A, and discharges the same into the chamber 0, from whence it is carried 011' by the current of water.

The objectin making the separate coils of pipe in the chamber 0 is to utilize the one flow 0t" water for both coils, and also for the purpose of absorbing theheat drawn from the freezing water by the pump. The pump acts to keep the two menstruums flowing through the separate coils while the third pump is drawing otf the released caloric from the cooling water in the freezing-chamber. The flow of water thus performs the triple operation of extracting the. heat from the ammonia and the saline solution and of carrying 0d the latent heat discharged into the water by the pump E. By this arrangement I secure a more rapid freezing of the water in the apparatus and a greater economy in the manutacture-of ice.

Having thus described my in vention,Ielai m as new and desire to secure by Letters Patent- 1. In ice-machines, the combination, with the freezing-chamber, ofthe coils b, for containing the ammonia, connected to the pump B, and the pump D, connected with the upper part-of the freezing-chamber for removing the saline solution, substantially as shown and defor removal ot'theammonia and saline solution 9 from the freezingchamber, substantially as described, combined for operation as set forth.

JNO. '1. DAVIS.

\Vi-tnesses Gno. D. WALKER, U. SEDGWIOK. 

